Final answer:
The statement 'PR data is valid globally through the controller' is False. The controller in this context refers to a device that manages and controls the flow of data in a computer network, but it does not ensure the validity of the data itself. Data validity is determined by various factors and techniques implemented at the application level or within specific protocols.
Step-by-step explanation:
The statement 'PR data is valid globally through the controller' is False. The controller in this context refers to a device that manages and controls the flow of data in a computer network. It is responsible for processing and forwarding data packets, but it does not necessarily ensure the validity of the data itself. Data validity is typically determined by various factors such as input validation, data verification techniques, error checking, and data integrity measures implemented at the application level or within specific protocols.